Add simple PeriodicTrigger ApplicationModule

Modules/include/PeriodicTrigger.h

+#ifndef CHIMERATK_APPLICATION_CORE_PERIODIC_TRIGGER_H
+#define CHIMERATK_APPLICATION_CORE_PERIODIC_TRIGGER_H
+
+#include "ApplicationCore.h"
+
+#include <chrono>
+
+namespace ChimeraTK {
+
+/**
+ * Simple periodic trigger that fires a variable once per second.
+ * After configurable number of seconds it will wrap around
+ */
+struct PeriodicTrigger : public ApplicationModule {
+    using ApplicationModule::ApplicationModule;
+
+    ScalarPollInput<int> timeout{this, "timeout", "s", "Timeout in seconds"};
+    ScalarOutput<int> tick{this, "tick", "", "Timer tick"};
+
+    void mainLoop()
+    {
+        tick = 0;
+        while (true) {
+            std::this_thread::sleep_for(std::chrono::seconds(1));
+            tick++;
+            tick %= timeout;
+            tick.write();
+        }
+    }
+};
+}
+
+#endif // CHIMERATK_APPLICATION_CORE_PERIODIC_TRIGGER_H